[Mesa-dev] [PATCH-RFC] i965: do not advertise MESA_FORMAT_Z_UNORM16 support

[Eric Anholt]

Chia-I Wu <olvaffe at gmail.com> writes:

> Since 73bc6061f5c3b6a3bb7a8114bb2e1ab77d23cfdb, Z16 support is not advertised
> for OpenGL ES contexts due to the terrible performance.  It is still enabled
> for desktop GL because it was believed GL 3.0+ requires Z16.
>
> It turns out only GL 3.0 requires Z16, and that is corrected in later GL
> versions.  In light of that, and per Ian's suggestion, stop advertising Z16
> support by default, and add a drirc option, gl30_sized_format_rules, so that
> users can override.

I don't think having the driconf option will help anybody.  Let's just
unconditionally drop Z16.
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